Improvement in friction-clutches



w. F. HOLSKE.

-FRICTIOI\T-CL UTCHES.. v I No.174,363. Patented March 7.1876.

ews:

N PETERS, FHOTO-LITHOGRAFHER. WASHINGTON, D G

UNI E STATES WILLIAM F. HOLSKE,

PATENT" OFrIoE.

OF NEW YORK, N. Y.

IMPROVEMENT IN FRlCTlON-C LUTCHES.

Specification-forming part of Letters Patent No. 174,363, dated March 7,1876; application filed. Y July 31, 1875. a

To all whom it may concerni Be it known that I, WILLIAM F. HOLsKE,

- of New York city, in the county and State of ployed in connection withthe loose or band pulley, is dispensed with, the band-pulley beingitself provided with a projecting hubrim to adapt it to receive ribsformed on each of a series of wedge-shaped blocks, which are connectedwith a sliding hub, by means of dovetailed; grooves, so as to slidethereon, and thus, when the latter is shifted on the feathered portionof the shaft, to lock with the band-pulley and cause it to rotate withthe shaft, as hereinafter described.

Referring to the drawing, Figure 1 is a side elevation ofmyimpigovement. Fig. 2 is a cross-sectional elevatidn of the samethrough the line a; a: in Fig. 1. Fig. 3 is an end elevation of thesliding hub, showing the lockingwedges and their seats. Fig. 4 is a planview of the same.

Similar letters in the various figures refer to the same parts.

A is the pulley-shaft; B, the loose pulley; G, the sliding hub,which bythe feather, at a, is caused to turn with the shaft, and permitted toslide longitudinallythereon. I) D are the usual stops. The centralportion of pulley B is provided with a hub, one end of which, b, is madeof conical form, and receives the interior of the hub O, which. is ofcorrespondin g form. Lubricating-oil is conveyed between the surfaces ofthe pulley-cone and the hub by oil-channel c. E is an annular rimattached to the .side of the pulley'A. Seated upon the hub G, in seatsof the form shown at f, between the inside of the rim E and the hub O, Iarrange one or more locking-wedges F, which are provided with beveledteeth g on their outer surfaces, which tit into corresponding beveledcavities upon the inside of the rim E. The inner surfaces or looks ofthe wedgesF are beveled, and provided at their edges with beveled orinclined feathers or tongues, h, which fit within corresponding inclinedgrooves made in the sides of the seats f in the beveled hub G. At 13, inthe hub O,

is the usual groove for the fork of the operating-lever. When the hubUis pushed in the direction of the arrows, the wedges F, by reason .oftheir inclined tongues seated within the corresponding inclinedgroovesin the hub (l, are pushed outward, so as to cause their beveledteeth 9 to press against and become locked within the correspondingrecesses of the rim E, thereby firmly locking the pulley B and hub O,and causing the pulley to revolve with shaft A; butwhen the hub O ismoved in the contrary direction the wedges F are drawn inward toward thecenter of the pulley,and the teeth 9 are unlocked from the rim E,leaving the pulley-B loose upon the shaft A. Thus the lateral movementof the hub G in one direction pushes the wedges F outward from thecenterof the pulley, and the contrary movement of the hub draws the wedgesi'nwardtoward thecenter of the pulley, thereby locking or unlocking thepulley B. 'In the case of small-sized or special pulleys, the interiorsurface of the pulley periphery takes the place of the rim E, and suchsurface is provided with beveled recesses to receive the teeth g, and insuch pulleys I omit the rim E.

I do not limit or confine myself to the exact form or position of any ofthe parts here shown, as they may be varied without departing from myinvention.

Having thus described my invention, I claim and desire to secure byLetters Patent- The combination, with the loose band-pulley B, havingthe inner projecting rim E, of the wedges'F and hub C, sliding onfeathers a, as shown and described.

WM. F. HOLSKE. Witnesses: l l

T. B. MOSHER, ALEX. F. ROBERTS.

